The University of Hong Kong confirmed that convalescent patients were twice infected with novel coronavirus

According to Hong Kong media, a COVID-19 convalescent returned to Hong Kong from Europe, and his novel coronavirus test results were positive again. The team of the Department of Microbiology of the University of Hong Kong confirmed that the patient was infected with novel coronavirus for the second time, which was the first case in the world

the patient with secondary infection with covid-19 was a 33 year old man. He was confirmed to be infected with novel coronavirus at the end of March this year. He recovered and was discharged from the hospital in mid April. He traveled to Spain in the UK in early August and was tested again after returning to Hong Kong. The team of the Department of Microbiology of the University of Hong Kong confirmed that the genetic sequencing of the virus strains infected by the patient twice was significantly different.

the team of the Department of Microbiology of the University of Hong Kong said that there were 24 differences in the genetic sequencing of the virus strains infected by the patient for the first time and the second time, and after the patient returned to Hong Kong for re diagnosis, the antibody in his body could not be detected at the time of admission, so it was determined that he was infected again after rehabilitation, rather than" Fuyang ". This was the world's first case of secondary infection with covid-19 after rehabilitation.

the team also pointed out that in the past, there has been evidence that the antibody level in patients with covid-19 will gradually decline after several months of infection. Du Qihong, an associate professor of clinical microbiology at the University of Hong Kong, believes that the secondary infection case this time shows that even after the diagnosis of COVID-19 recovers, it may not be" immune for life " Novel coronavirus may exist in people for a long time like influenza virus. He also said that the emergence of secondary infection cases will also have implications for vaccine research

Since it is still possible to be reinfected after 4 months after recovery, the "group" immunization method previously advocated by European and American countries is naturally invalid. When talking about this discovery, Dr. Zhang Wenhong said, The reinfection cases found this time are not only related to the persistence of immunity, but also related to the time of future vaccine protection and the interval of repeated vaccination However, Dr. Zhang Wenhong also said that the reinfection occurred four months later, which is still a case and should be observed in a larger post infection population, < spantext indent: 2em;" > At present, more than 22 million people in the world have been infected. If "reinfection" is established, < spantext indent: 2em;" > Then in areas with high incidence and epidemic of covid-19, reinfection will become the norm, < spantext indent: 2em;" > At the same time, we have to wait for further scientific reports from HKU He also said that at present, there is no need to be too nervous, < spantext indent: 2em;" > After all, the post infection immunization time of other covid-19 covid-19 covid-19 covid-19 covid-19 covid-19 covid-19 covid-19 covid-19 covid-19 covid-19 covid-19 covid-19 covid-19 covid-19 covid-19 covid-19 covid

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